This is an Optional Long Prop Nut and Washer Set for the
O.S. Max .60FP, .65LA, .61FX, .91FX Engines.
FEATURES: Metal construction.
For use where an extra thick propeller boss (center) and/or spinner
backplate does not leave enough threads for a standard propeller
nut to tighten down onto the propeller. This nut has an extension
that goes through the propeller and then extends out past the end
of the crankshaft with a hex nut for tightening.
This also helps keep the propeller on the engine in the case of
backfiring or detonation.
This can also be used on most engines that have 5/16"- 24 threading.
INCLUDES: One prop nut with 5/16"- 24 threading
One prop washer
REQUIRES: 9/16" opened end wrench (15mm is slightly too big)
SPECS: Propeller Nut- Extension Outer Diameter: 9.6mm
Extension Length: 13mm
Overall Length: 20mm
Inner Threading: 5/16" x 24
Propeller Washer- Inner Diameter: 10mm
Outer Diameter: 28mm